[rrd-users] Fw: Peaks in Graphs!!!

[Shahira Rasmy]

   Hi,
   Thanks for your reply but there is something that i don't understand...
   Where shall i use this type??
   The type specification in the mrtg configuraion file doesn't understand
 except the three type counter,guage and absolute only....
   So how can i make the rrdtool understand derive instead of counter???

    Waiting for your reply
     Thanks,

 ----- Original Message -----
> From: George Dau <gedau at isa.mim.com.au>
> To: 'Shahira Rasmy' <shahira at nile-online.net>
> Sent: Tuesday, June 18, 2002 2:10 AM
> Subject: RE: [rrd-users] Peaks in Graphs!!!
>
>
> > You are most likely using the COUNTER data type. This data type
correctly
> > handles couter wraps, but does not handle counters that get zeroed by a
> > power outage or other legitimate reset. The problem is that RRDtool sees
> > that the counter is now less than it was last time, and assumes that
there
> > was a counter wrap. This is often not the case, the counter may have
been
> > reset before it got to its maximum value. This happens all the time to
me.
> >
> > The fix is not to use COUNTER, but to use DERIVE and set a minumum value
> of
> > zero (this is important). You will loose a data point when a reset
occurs,
> > or when a wrap occurs, but this is better (for me) than a spike when a
> > counter is reset.
> >



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